$1.$ Which of the following is not a parameter commonly used to describe engine performance?

$-$ A$)$ Torque

$-$ B$)$ Horsepower

$-$ C$)$ Luminosity

$-$ D$)$ Efficiency

$2.$ The parameter that measures the rotational force produced by an engine is known as:

$-$ A$)$ Horsepower

$-$ B$)$ Torque

$-$ C$)$ RPM

$-$ D$)$ Displacement